16 If a malicious witness takes the stand to accuse someone of a crime, 17 the two people involved in the dispute must stand in the presence of the Lord before the priests and the judges who are in office at the time. 18 The judges must make a thorough investigation, and if the witness proves to be a liar, giving false testimony against a fellow Israelite, 19 then do to the false witness as that witness intended to do to the other party. You must purge the evil from among you. 20 The rest of the people will hear of this and be afraid, and never again will such an evil thing be done among you. 21 Show no pity: life for life, eye for eye, tooth for tooth, hand for hand, foot for foot.

Matthew Henry's Commentary on Deuteronomy 19:16-21

Commentary on Deuteronomy 19:15-21

(Read Deuteronomy 19:15-21)

Sentence should never be passed upon the testimony of one witness alone. A false witness should suffer the same punishment which he sought to have inflicted upon the person he accused. Nor could any law be more just. Let all Christians not only be cautious in bearing witness in public, but be careful not to join in private slanders; and let all whose consciences accuse them of crime, without delay flee for refuge to the hope set before them in Jesus Christ.